Thermoformable composite film with metallic appearance

Abstract

A double-layered or multilayered thermoformable composite film having a metallic appearance that includes a first film with a metallized surface and a gloss value in the range of 50 to 600. The inventive thermoformable composite films have an appearance that is the same as that of a composite film including a metallic foil, particularly an aluminum foil.

1 . A two- or multiple-ply thermoformable composite film comprising
 a first metallic-appearance surface with CIE color coordinates L 1 *, a 1 *, b 1 *, where 90≤L 1 *≤97, −3≤a 1 *≤3, −3≤b 1 *≤3;   a first film made of a first polymeric material with a metallic coating;   a second film made of a second polymeric material with CIE color coordinates L 2 *, a 2 *, b 2 *, where 60≤L 2 *≤90, −3≤a 2 *≤3, −3≤b 2 *≤3;   
       where
 the first film is arranged between the second film and the first surface, and the metallic coating of the first film is visible from a side of the first surface; 
 wherein 
 the first surface has gloss value G 1 , where 50≤G 1 ≤600. 
 
     
     
         2 . The composite film according to  claim 1 , wherein
 50≤G 1 ≤150, 100≤G 1 ≤200, 150≤G 1 ≤250, 200≤G 1 ≤300, 250≤G 1 ≤350, 300≤G 1 ≤400, 350≤G 1 ≤450, 400≤G 1 ≤500, 450≤G 1 ≤550 or 500≤G 1 ≤600.   
     
     
         3 . The composite film according to  claim 1 , wherein the first surface has CIE lightness including specular component L 1 * and CIE lightness excluding specular component {tilde over (L)} 1 , where 0.65·L 1 *≤{tilde over (L)} 1 ≤0.9·L 1 *. 
     
     
         4 . The composite film according to  claim 1 , wherein the first film has CIE colour coordinates equal to L 1 *, a 1 *, b 1 *. 
     
     
         5 . The composite film according to  claim 1 , wherein the first film has CIE lightness including specular component equal to L 1 * and CIE lightness excluding specular component equal to {tilde over (L)} 1 , where 0.65·L 1 *≤{tilde over (L)} 1 ≤0.9·L 1 *. 
     
     
         6 . The composite film according to  claim 1 , wherein a CVD coating, PVD coating or sputter coating made of a metal or of a metal alloy has been disposed on the first film. 
     
     
         7 . The composite film according to  claim 1 , wherein a coating made of aluminum has been disposed on the first film.